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authorIan Campbell <ian.campbell@citrix.com>2012-01-04 11:39:52 +0000
committerKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>2012-01-04 17:02:05 -0500
commita800651e8893007d3a12bc281f0265f18043c4fa (patch)
treeb2b0a01e26c9dbbe99f3fa4028f8da5bca00020e /drivers/xen/xenbus
parent50bf73796e85ed6a061df6d8474f7cef7870df6a (diff)
downloadblackbird-op-linux-a800651e8893007d3a12bc281f0265f18043c4fa.tar.gz
blackbird-op-linux-a800651e8893007d3a12bc281f0265f18043c4fa.zip
xen/xenbus: don't reimplement kvasprintf via a fixed size buffer
Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Cc: Haogang Chen <haogangchen@gmail.com> Acked-by: Jan Beulich <JBeulich@suse.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'drivers/xen/xenbus')
-rw-r--r--drivers/xen/xenbus/xenbus_xs.c17
1 files changed, 7 insertions, 10 deletions
diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c
index 6f0121e3be69..226d1ac55cf4 100644
--- a/drivers/xen/xenbus/xenbus_xs.c
+++ b/drivers/xen/xenbus/xenbus_xs.c
@@ -532,21 +532,18 @@ int xenbus_printf(struct xenbus_transaction t,
{
va_list ap;
int ret;
-#define PRINTF_BUFFER_SIZE 4096
- char *printf_buffer;
-
- printf_buffer = kmalloc(PRINTF_BUFFER_SIZE, GFP_NOIO | __GFP_HIGH);
- if (printf_buffer == NULL)
- return -ENOMEM;
+ char *buf;
va_start(ap, fmt);
- ret = vsnprintf(printf_buffer, PRINTF_BUFFER_SIZE, fmt, ap);
+ buf = kvasprintf(GFP_NOIO | __GFP_HIGH, fmt, ap);
va_end(ap);
- BUG_ON(ret > PRINTF_BUFFER_SIZE-1);
- ret = xenbus_write(t, dir, node, printf_buffer);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = xenbus_write(t, dir, node, buf);
- kfree(printf_buffer);
+ kfree(buf);
return ret;
}
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